MeetStreet

A business meeting and social meetup app (only 6MB and no registration required) that lets you set and accept one-to-one appointments or group meetups on your phone. It syncs with your phone calendar and works with Facebook Messenger, Whatsapp, Linkedin and even text/SMS. It even has built-in chat messenger.
FEATURES
- Set and accept appointments via Facebook Messenger, Whatsapp, Linkedin, text/SMS and email
- Auto synchronize appointments with your phone calendar
- Built-in chat function
- Send active reminder to the person you are meeting
- Create group meetups
- Share your upcoming appointments in your status
- Supports mobile number and email
- Only 6MB in filesize and no sign-up needed